Race briefing: UTMB

Joseph Mestrallet

🏃🏼‍♂️ Enduraw Race Briefing for Joseph for UTMB 🏃‍♀️

1. 🏃🏼‍♂️ - Runner info

InformationsValue
NameMestrallet
First NameJoseph
NationalityFrance
Age27
TeamEnduraw

Joseph, here is your race briefing for UTMB, we wish you a great performance for this race, best of luck!

2. 🏔 - Race Analysis

ParametersValueUnit
Distance176.41km
Elevation Gain9940.0m
Elevation Loss9952.0m
Max altitude2579.0m
Min altitude810.0m
Avg altitude1708.21m
Distance gradient ≥ 8% 51km

⏬ Below, you can see your race local elevation, gradient and a 3D visualization of the profile.

🟩 Green areas refer to steeper negative gradients, while 🟥 red areas to steeper positive ones, with regard to the UTMB profile. 🎢

📊 The UTMB can be compared to similar races in terms of elevation and distances:

🗺️ Here you have the map of the race. You can zoom in to explore and visualize the trace:

3. 📈 - Pacing Strategy

Your pacing plan is customized according to 4 points:

🥇 Your expected finish time.

⛰️ Your positive and negative elevation gain (the GAP we talked about earlier).

⏱️ Your pacing strategy, in this case a slight negative split of -8%.

⏳ The natural drift at the end of the race.

This will give you crossing points to respect at key race points/aid station!

Aid StationKMDistance between (km)Time
Les Houches7.87.801:03:34
Saint-Gervais21.613.703:22:12
Les Contamines31.29.704:51:29
Notre Dame De La Gorge35.74.405:27:01
La Balme39.94.206:14:56
Col Du Bonhomme43.73.807:12:03
Refuge De La Croix Du Bonhomme45.72.107:29:15
Les Chapieux51.05.208:07:55
Col De La Seigne61.810.810:08:15
Col Des Pyramides Calcaires64.52.710:40:56
Refuge Elisabetta67.22.711:02:52
Lac Combal70.43.211:30:04
Arête Du Mont Favre73.12.712:07:13
Checrouit - Maison Vieille77.74.612:35:36
Courmayeur Forum Sport Center82.75.013:15:48
Refuge Bertone88.25.514:37:15
Refuge Bonatti95.87.615:36:55
Arnouvaz101.05.216:15:59
Grand Col Ferret105.74.717:24:04
La Peule109.33.617:52:34
La Fouly115.66.418:38:09
Praz De Fort123.78.119:36:41
Champex-Lac129.55.820:36:42
Plan De L'Au134.44.921:15:36
La Giète141.06.722:35:35
Trient145.94.923:03:42
Les Tseppes150.04.024:06:49
Vallorcine158.08.125:21:38
Col Des Montets162.74.625:57:32
Tête De Béchar164.51.826:21:51
La Flégère169.44.927:12:49
Chamonix176.47.028:00:00

4. ⛈ - Weather conditions

(Updated 24 hours before the race)

ParametersValueUnit
Max temperature4°C
Min Temperature2°C
Average Temperature3°C
Wind speed (at departure)3.1km/h
Wind direction (at departure)117°
Risk of rainRain/

☀️🌡️🍃 At each aid station, the weather is predicted from your checkpoint goal time :

Aid StationCould Coverage (%)Temperature (°C)Wind Speed (km/h)Humidity (%)Time
Les Houches995.14.3852025-02-11 16:08:34
Saint-Gervais1006.35.9772025-02-11 18:27:12
Les Contamines1002.92.2902025-02-11 19:56:29
Notre Dame De La Gorge1003.02.0852025-02-11 20:32:01
La Balme981.22.3842025-02-11 21:19:56
Col Du Bonhomme97-2.56.0962025-02-11 22:17:03
Refuge De La Croix Du Bonhomme96-3.75.61002025-02-11 22:34:15
Les Chapieux801.91.3932025-02-11 23:12:55
Col De La Seigne88-4.89.0932025-02-12 01:13:15
Col Des Pyramides Calcaires100-5.96.51002025-02-12 01:45:56
Refuge Elisabetta91-4.82.4962025-02-12 02:07:52
Lac Combal91-3.42.4962025-02-12 02:35:04
Arête Du Mont Favre100-5.32.0962025-02-12 03:12:13
Checrouit - Maison Vieille65-3.13.1912025-02-12 03:40:36
Courmayeur Forum Sport Center930.10.7982025-02-12 04:20:48
Refuge Bertone99-3.50.5952025-02-12 05:42:15
Refuge Bonatti100-4.22.21002025-02-12 06:41:55
Arnouvaz81-2.33.2932025-02-12 07:20:59
Grand Col Ferret68-6.08.9902025-02-12 08:29:04
La Peule3-3.410.2822025-02-12 08:57:34
La Fouly102.112.6612025-02-12 09:43:09
Praz De Fort06.76.2522025-02-12 10:41:41
Champex-Lac05.24.5502025-02-12 11:41:42
Plan De L'Au365.13.1712025-02-12 12:20:36
La Giète1000.91.8782025-02-12 13:40:35
Trient1005.22.6642025-02-12 14:08:42
Les Tseppes1000.63.1742025-02-12 15:11:49
Vallorcine973.51.0712025-02-12 16:26:38
Col Des Montets1002.44.3852025-02-12 17:02:32
Tête De Béchar1000.64.6872025-02-12 17:26:51
La Flégère97-0.62.6932025-02-12 18:17:49
Chamonix1004.02.1902025-02-12 19:05:00

👕 Make sure your equipment is adapted to the weather you will face during the race! 🧊🔥

🤓 Enduraw advices:

  • Use light but warm layers during the night : be an oignon ! 🌙
  • Make sure your clothes breath enough to optimize thermo-regulation 🌡️
  • At high altitude, sun glasses are good allies to avoid luminosity disturbances 🕶️
  • Get technical accessoires you can easily wear/take off when moving from sunlight to darker areas 🌲

5. ⏱️ - Pacing Plan

6. 🥤🍟 - Feeding and Hydration

Nutrition and hydration are crucial to the success of a race! It is very individual and we have estimated your average carbohydrates intake based on your gender, height, age and weight (if not explicitly stated from your habits).

⏱️ Carbohydrates per hour : 90 (g/hour),

🍎 Total carbohydrates ingestion: 2515.15 (g),

💦 Total liquid ingestion: 16768 (mL).

Aid StationKM25g CHO portion500mL water
Les Houches7.841
Saint-Gervais21.651
Les Contamines31.241
Notre Dame De La Gorge35.721
La Balme39.930
Col Du Bonhomme43.721
Refuge De La Croix Du Bonhomme45.710
Les Chapieux51.021
Col De La Seigne61.851
Col Des Pyramides Calcaires64.521
Refuge Elisabetta67.220
Lac Combal70.411
Arête Du Mont Favre73.131
Checrouit - Maison Vieille77.710
Courmayeur Forum Sport Center82.731
Refuge Bertone88.231
Refuge Bonatti95.841
Arnouvaz101.021
Grand Col Ferret105.741
La Peule109.320
La Fouly115.621
Praz De Fort123.721
Champex-Lac129.541
Plan De L'Au134.421
La Giète141.051
Trient145.921
Les Tseppes150.041
Vallorcine158.041
Col Des Montets162.721
Tête De Béchar164.521
La Flégère169.431
Chamonix176.431

❗At each aid station, this is the amount of carbs and water you should have ingested ❗

🤓 Enduraw advices:

  • 🚩 Do not try new nutrition on race day ! Make sure you eat food you know and trained with 🏃‍➡️
  • To counterbalance sweating, make sure you have isotonic drinks or salty food during your effort 🧂
  • Alternate between hot and cold food ☕🧋
  • Chose different carbs inputs to keep taste and motivation 🥨🍫🍑
  • Performance also stand in your pleasure! Add pleasure aliments, and not only carbs if needed 🧀🥚

👑 - More features

📈 For greater accuracy, your nutrition can be even more personalized with your exact intake per hour.
This can be determined by experience (what you're used to, what worked well for you in the past) or by carrying out laboratory tests.

🏆 To achieve your greatest goals, pacing plans can be optimized with regard to your physiological response to the effort (heart rate, energetic output).

Contact us to pursue individualization deeper and exploit your full potential!

This race briefing has been proposed by Enduraw
  • Enduraw is a sports performance research laboratory.
  • We believe data can help us visualize/understand/predict more accurately.
  • With Enduraw we turn raw data into relevant analyses.